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util: Use util_sign_extend in fast_idiv_by_const 

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Kristian H. Kristensen <hoegsberg@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17214>
This commit is contained in:
Jason Ekstrand 2022-06-23 12:34:51 -05:00 committed by Marge Bot
parent 53eeb1e238
commit 1df29825e7
1 changed files with 1 additions and 7 deletions
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8
src/util/fast_idiv_by_const.c
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@ -169,12 +169,6 @@ util_compute_fast_udiv_info(uint64_t D, unsigned num_bits, unsigned UINT_BITS)
return result;
}
static inline int64_t
sign_extend(int64_t x, unsigned SINT_BITS)
{
return (int64_t)((uint64_t)x << (64 - SINT_BITS)) >> (64 - SINT_BITS);
}
struct util_fast_sdiv_info
util_compute_fast_sdiv_info(int64_t D, unsigned SINT_BITS)
{
@ -236,7 +230,7 @@ util_compute_fast_sdiv_info(int64_t D, unsigned SINT_BITS)
delta = abs_d - remainder2;
} while (quotient1 < delta || (quotient1 == delta && remainder1 == 0));
result.multiplier = sign_extend(quotient2 + 1, SINT_BITS);
result.multiplier = util_sign_extend(quotient2 + 1, SINT_BITS);
if (D < 0) result.multiplier = -result.multiplier;
result.shift = exponent - SINT_BITS;
return result;